AquaMedic 55W Helix UV Sterilizer. **** PRODUCT MANUAL **** Aqua Medic Helix-Max UV serilizers use an improved and more aggressive spiraling flow design that incorporates more "twists" in a single pass through the housing. This huge increase in contact time means big gains in efficiancy. A more efficient sterilizer kills more protozoa, more pathogens, and more single cell algae per pass... producing clearer water and healthier animals. Unique mounting plates, graduated fittings, heavy duty housing with rotating inlate/outlet collars allow for easy plumbing at any angle, in any position for any hose size. Highly efficient electronic ballasts are remotely located in a sealed box along the power cord to make maintenance easier and operation worry free. Uninized housing end-cap allows easy maintenance access while ensuring a positive seal. 55W Model Specifications: - Recommended Flow Rate: up to 1,200 gph - Recommended Tank Size: 500-750 gal. - Inlet/Outlet: Fits hose sizes: 3/4", 1", 1.25", 1.5" - Dimensions: 26" x 4.5"